Parameteric studies of nonlinear oblique magnetosonic waves in two-ion-species plasmas
- Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
The study of the effects of ion composition on perpendicular magnetosonic waves in two-ion-species plasmas [M. Toida, H. Higashino, and Y. Ohsawa, J. Phys. Soc. Jpn. 76, 104052 (2007)] is extended to include oblique waves. First, the conditions necessary for KdV equations for low- and high-frequency modes to be valid are analytically obtained. The upper limit of the amplitude of the low-frequency-mode pulse is expressed as a function of the propagation angle {theta}, density ratio, and cyclotron frequency ratio of the two ion species. Next, with electromagnetic particle simulations, the nonlinear evolution of a long-wavelength low-frequency-mode disturbance is examined for various {theta}s in two plasmas with different ion densities and cyclotron frequency ratios, and the theory for the low-frequency-mode pulse is confirmed. It is also shown that if the pulse amplitude exceeds the theoretical value of the upper limit of the amplitude, then shorter-wavelength low- and high-frequency-mode waves are generated.
- OSTI ID:
- 21546947
- Journal Information:
- Physics of Plasmas, Vol. 18, Issue 6; Other Information: DOI: 10.1063/1.3596381; (c) 2011 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CYCLOTRON FREQUENCY
ION ACOUSTIC WAVES
ION DENSITY
KORTEWEG-DE VRIES EQUATION
MAGNETOACOUSTIC WAVES
NONLINEAR PROBLEMS
PLASMA
PLASMA DENSITY
PLASMA SIMULATION
DIFFERENTIAL EQUATIONS
EQUATIONS
HYDROMAGNETIC WAVES
ION WAVES
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA WAVES
SIMULATION